Osprey Sirrus
(3 products)- Hiking Backpacks (3)
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- $200.00 to $499.99 (2)
- 1.50 to 2.99 (1)
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- OspreySirrus 34 Pack - Women'sTop Rated$200.00(20)20 reviews with an average rating of 4.5 out of 5 stars
- OspreySirrus 24 Pack - Women's$180.00(60)60 reviews with an average rating of 4.3 out of 5 stars
- OspreySirrus 36 Pack - Women's$220.00(8)8 reviews with an average rating of 3.1 out of 5 stars
Related Expert Advice articles
Types of packs
Backpacking packs can be 30 to 70-plus liters. To choose the right capacity, consider trip duration and the gear you’ll bring.
Backpack features
Think about the frame type, location of important pockets, padding and ventilation, among other things.
Backpack fit
Your pack should be correctly sized for your torso length (not overall height) and hip circumference. A fit-expert at an REI store can help.
How to Choose a Running Hydration Vest
Choose a gear capacity
Runs under 2 hours: 2 liters
Runs 2-3 hours: 2 to 6 liters
Runs 3-6 hours: 4 to 12 liters
Runs over 6 hours: 6+ liters
Decide on bottles and/or reservoir
Most vests are compatible with both bottles and reservoirs.
Bottles are easier and faster to refill, usually holding 500 ml of water each.
Bottles can be soft or rigid. Rigid bottles are more durable.
Reservoirs hold more water, up to several liters.
Get the right fit
Follow the manufacturer’s sizing guidelines.
Choose a snug fit. (Measure your chest while wearing your sports bra.)
Leave room for adjustment: The straps should sit in the middle of their adjustment range.
Women-specific vests offer fits optimized for the bust and shoulders.